Call 005 T201907103

BR 1-084 ON N234 TWADDELL MILL ROAD OVER TRIBUTARY TO BRANDYWINE CREEK - Bridge 1-084 is located north of Wilmington in New Castle County, Delaware. The existing structure was constructed in 1932 and consists of a reinforced concrete slab that rests on a stone abutment created from the wingwalls from the previous structure. The replacement of Bridge 1-084 has been proposed due to deep voids and loss of fill between the stones in the walls of the abutment, deep concrete spalls in the face of the concrete slab with exposed rebar, and various settlement issues around the structure that were found during routine bridge inspections and the subsequent diminishing structural integrity of the structure. The bridge has a current sufficiency rating of 59.2. The scope of the proposed project is to replace the concrete slab and stone abutment with a 5-foot diameter reinforced concrete pipe. Additional improvements include minor approach roadway work, additional recoverable area in the vicinity of the structure, and placing riprap in the stream for scour protection. Bridge replacement will be performed under a full road closure with a posted detour. Follow other incidental construction in accordance with the location, notes and details shown on the plans, and as directed by the Engineer.